Abstract: The serum proteins in three yak populations of Qinghai Guoluo, Tianjun and Haiyan have been examinedusing the technique of two dimensional polyacrylamide gel electrophoresis, the patterns of which have much in common, all having more than 100 polypeptides; The electrophoresis patterns of Guoluo and Tianjun populations are quite similar, both differ distinctly from that of Haiyan population in 4 pept ides; Based on the results of electrophoresis and the results from former authors, possible causes that led to the difference between high land yak and lake land yak as well as the taxonomic status of them are discussed. This study provides biological information for further studies on taxonomy and evolution of yak.

Key words: Serum protein, Yak (Bos grunniens), Two-dimensional electrophoresis

摘要： 本文首次报道了用双向电泳技术对青海果洛、天峻、海晏3个地区牦牛种群的血清蛋白的比较研究结果。各群体血清蛋白双向电泳图谱格局相似, 共有一百多个多肽斑点。果洛群体与天峻群体的电泳图谱更相近, 两者与海晏群体的电泳图谱在4个多肽斑点上差异很大。由电泳结果结合解剖学、生态学的研究成果讨论了造成高原型牦牛与环湖型牦牛差异的可能原因以及两者的分类学地位。为进一步探讨牦牛的分类和演化提供了生化资料。

关键词: 牦牛, 血清蛋白, 双向电泳